Climate scientists say likelihood of extreme summers surging due to global warming

Report's authors say Sydney unprepared for knock-on effects of a significant increase in average summer temperatures

New South Wales, which has just experienced its hottest summer on record, is 50 times more likely to experience another similarly hot summer and 10 times more likely to experience extremely hot days under climate change, according to a group of Australian climate scientists.

The mean temperature in Sydney was 2.8C above average in December, January, and February, according to the Bureau of Meteorology, and the three-day heatwave from 9 February to 11 was the hottest on record from Sydney to Brisbane, breaking records set in 1939.